Display screen or portion thereof having a graphical user interface for button menus



FIG. 1 is a front view of a first embodiment of the display screen orportion thereof having a graphical user interface for button menusshowing my new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The outermost broken lines and the broken line showing of rounded shapesillustrate an electronic device and the remaining broken linesillustrate portions of the animated graphical user interface. None ofthe broken lines form part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereofhaving a graphical user interface for button menus, as shown anddescribed.